短日照处理对不同海拔高度一品红苞片的影响

Effects of Short Sunshine Treatment on Bracts of Different Poinsettia Cultivars at Different Altitudes

在恩施地区不同海拔高度对一品红(Euphorbia pulcherrima Willd. et Kl.)4个不同品种金奖、阳光、旗帜1、旗帜2进行短日照处理,探讨其对一品红苞片的影响,从而研究出适合一品红苞片变色的最佳海拔高度和最佳品种。结果表明,海拔高度800～1 080 m是一品红短日照处理的最佳地段;一品红4个不同品种在同一海拔高度的生长状况差异不明显,一品红同一品种在不同海拔高度的生长状况差异明显,金奖的生长情况最好。在海拔800～1 080 m对一品红品种金奖进行短日照处理效果最好。

The experiment was conducted to study the effects of short sunshine treatment on bracts of four different poinsettia（Euphorbia pulcherrima Willd. et Kl.） cultivars at different altitudes in Enshi including Gold prize, Sunshine, Flag 1, Flag 2, so the optimum altitude and the best varieties suitable for red poinsettia bracts could be obtained. The results showed that the altitude of 800 to 1 080 meters was the best location of poinsettia short-day treatment. The growth of four different varieties of poinsettia in the same altitude condition was not obvious, but at the different altitude was obvious. The growth conditions of the Gold prize was better than that of the others. The final results suggested, at the altitude of 800 to 1 080 meters,the effect was the best for the short-day treatment of Gold prize.